generateorderaction.java

网上购物车的JAVA代码实现版

package feng.shoppingcart.web.action;
import java.util.Collection;
import java.util.HashSet;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import feng.shoppingcart.entity.*;
import feng.shoppingcart.biz.*;
import feng.shoppingcart.util.*;

import org.apache.struts.action.*;
public class GenerateOrderAction extends Action {
	@Override
	public ActionForward execute(ActionMapping mapping,ActionForm form,HttpServletRequest request,
			HttpServletResponse response) throws Exception{
		UserBiz biz=UtilContext.getUserBiz();
		try{
			User user=(User)request.getSession(true).getAttribute("user");
			if(user==null)	return mapping.findForward("nologin");
			Cart cart=(Cart) request.getSession(true).getAttribute("cart");
			if(cart==null)	return mapping.findForward("cartnull");
			if(cart.getItems().size()==0)	return mapping.findForward("cartnull");
			Order order=new Order();
			order.setCost(cart.getCost());
			order.setUser(user);
			Collection<Item> items=new HashSet<Item>();
			for(Item item:cart.getIte()){
				item.setOrder(order);
				items.add(item);
			}
			order.setItems(items);
			biz.insertOrder(order);
			return mapping.findForward("orderOk");
		}catch(Exception e){
			e.printStackTrace();
			return mapping.findForward("orderError");
		}
	}
}